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The device_rebuild feature enables sequential reconstruction when
resilvering. Mirror vdevs can be rebuilt in LBA order which may
more quickly restore redundancy depending on the pools average block
size, overall fragmentation and the performance characteristics
of the devices. However, block checksums cannot be verified
as part of the rebuild thus a scrub is automatically started after
the sequential resilver completes.
The new '-s' option has been added to the `zpool attach` and
`zpool replace` command to request sequential reconstruction
instead of healing reconstruction when resilvering.
zpool attach -s <pool> <existing vdev> <new vdev>
zpool replace -s <pool> <old vdev> <new vdev>
The `zpool status` output has been updated to report the progress
of sequential resilvering in the same way as healing resilvering.
The one notable difference is that multiple sequential resilvers
may be in progress as long as they're operating on different
top-level vdevs.
The `zpool wait -t resilver` command was extended to wait on
sequential resilvers. From this perspective they are no different
than healing resilvers.
Sequential resilvers cannot be supported for RAIDZ, but are
compatible with the dRAID feature being developed.
As part of this change the resilver_restart_* tests were moved
in to the functional/replacement directory. Additionally, the
replacement tests were renamed and extended to verify both
resilvering and rebuilding.
Original-patch-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: John Poduska <jpoduska@datto.com>
Co-authored-by: Mark Maybee <mmaybee@cray.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10349
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2018, Intel Corporation.
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* Copyright (c) 2020 by Lawrence Livermore National Security, LLC.
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*/
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#ifndef _SYS_VDEV_REBUILD_H
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#define _SYS_VDEV_REBUILD_H
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#include <sys/spa.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Number of entries in the physical vdev_rebuild_phys structure. This
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* state is stored per top-level as VDEV_ZAP_TOP_VDEV_REBUILD_PHYS.
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*/
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#define REBUILD_PHYS_ENTRIES 12
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/*
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* On-disk rebuild configuration and state. When adding new fields they
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* must be added to the end of the structure.
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*/
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typedef struct vdev_rebuild_phys {
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uint64_t vrp_rebuild_state; /* vdev_rebuild_state_t */
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uint64_t vrp_last_offset; /* last rebuilt offset */
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uint64_t vrp_min_txg; /* minimum missing txg */
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uint64_t vrp_max_txg; /* maximum missing txg */
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uint64_t vrp_start_time; /* start time */
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uint64_t vrp_end_time; /* end time */
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uint64_t vrp_scan_time_ms; /* total run time in ms */
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uint64_t vrp_bytes_scanned; /* alloc bytes scanned */
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uint64_t vrp_bytes_issued; /* read bytes rebuilt */
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uint64_t vrp_bytes_rebuilt; /* rebuilt bytes */
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uint64_t vrp_bytes_est; /* total bytes to scan */
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uint64_t vrp_errors; /* errors during rebuild */
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} vdev_rebuild_phys_t;
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/*
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* The vdev_rebuild_t describes the current state and how a top-level vdev
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* should be rebuilt. The core elements are the top-vdev, the metaslab being
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* rebuilt, range tree containing the allocted extents and the on-disk state.
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*/
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typedef struct vdev_rebuild {
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vdev_t *vr_top_vdev; /* top-level vdev to rebuild */
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metaslab_t *vr_scan_msp; /* scanning disabled metaslab */
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range_tree_t *vr_scan_tree; /* scan ranges (in metaslab) */
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/* In-core state and progress */
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uint64_t vr_scan_offset[TXG_SIZE];
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uint64_t vr_prev_scan_time_ms; /* any previous scan time */
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/* Per-rebuild pass statistics for calculating bandwidth */
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uint64_t vr_pass_start_time;
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uint64_t vr_pass_bytes_scanned;
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uint64_t vr_pass_bytes_issued;
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/* On-disk state updated by vdev_rebuild_zap_update_sync() */
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vdev_rebuild_phys_t vr_rebuild_phys;
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} vdev_rebuild_t;
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boolean_t vdev_rebuild_active(vdev_t *);
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int vdev_rebuild_load(vdev_t *);
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void vdev_rebuild(vdev_t *);
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void vdev_rebuild_stop_wait(vdev_t *);
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void vdev_rebuild_stop_all(spa_t *);
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void vdev_rebuild_restart(spa_t *);
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void vdev_rebuild_clear_sync(void *, dmu_tx_t *);
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int vdev_rebuild_get_stats(vdev_t *, vdev_rebuild_stat_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_VDEV_REBUILD_H */
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